SM UC-27 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 29 August 1915 and was launched on 28 June 1916. She was commissioned into the German Imperial Navy on 25 July 1916 as SM UC-27."SM" stands for "Seiner Majestät" () and combined with the U for Unterseeboot would be translated as His Majesty's Submarine. In 14 patrols, UC-27 was credited with sinking 58 ships, either by torpedo or by mines laid.
SS Skifted left from Mariehamn at 8:30 o'clock 14 December 1916, carrying 56 military persons, 7 workers, 15 members of the crew, and 13 civilians, a total of 91 persons. One hour later it was hit by the sea mines laid by the UC-27 and sank soon near Ledsun on the territory of the Lemland municipality of Åland. 86 persons died.laiva
UC-27 was surrendered to France on 3 February 1919 and was broken up at Landerneau in July 1921.
Design A Type UC II submarine, UC-27 had a displacement of when at the surface and while submerged. She had a length overall of , a beam of , and a draught of . The submarine was powered by two six-cylinder four-stroke diesel engines each producing (a total of ), two electric motors producing , and two propeller shafts. She had a dive time of 48 seconds and was capable of operating at a depth of .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . UC-27 was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one Uk L/30 deck gun. Her complement was twenty-six crew members.
Summary of raiding history DateNameNationalityTonnageMerchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.Fate28 October 1916Kazanets580Sunk7 November 1916Letun1,260Damaged19 November 191615,544Damaged22 November 1916Fugas150Sunk18 December 1916Buki4,499Sunk21 December 1916Skiftet336Sunk6 April 1917Narberth Castle168Sunk6 April 1917Nestor176Sunk12 April 1917Ernst Sophie222Sunk13 April 1917Kariba3,697Sunk15 April 1917Gretaston3,395Sunk18 April 1917Thomas132Sunk26 April 1917Augusta686Sunk26 April 1917Gennarino248Sunk16 June 1917Emsli31Sunk16 June 1917Kamouma18Sunk16 June 1917Kibira8Sunk16 June 1917Liberte12Sunk16 June 1917Metlaoni30Sunk17 June 1917Argentina41Sunk17 June 1917Bell Angelina14Sunk17 June 1917Giuseppe S.20Sunk17 June 1917Luigina19Sunk17 June 1917San Antonio V23Sunk18 June 1917Bettina140Sunk18 June 1917Bianca B.329Sunk18 June 1917Letizia G.136Sunk18 June 1917Marietta B.53Sunk18 June 1917Paolina Aida250Sunk19 June 1917Amalia22Sunk19 June 1917Antonio Balbi25Sunk19 June 1917Domenica Madre51Sunk19 June 1917La Michelina34Sunk19 June 1917Mistica Rosa31Sunk19 June 1917Raffaelo24Sunk19 June 1917Rosinella27Sunk19 June 1917S. Vincenzo Ferrari P.52Sunk19 June 1917San Antonio28Sunk19 June 1917San Giovanni Battista32Sunk20 June 1917Ruperra4,232Sunk23 June 1917Jules49Sunk26 July 1917Mooltan9,621Sunk6 August 1917El Kaddra Nr. 5320Sunk7 August 1917Esemplare999Sunk12 September 1917Gibraltar3,803Sunk16 September 1917Annina Capano250Sunk17 September 1917Eugenio D.99Sunk17 September 1917Muccio137Sunk23 September 1917Joaquina69Sunk23 September 1917Medie4,770Sunk26 February 1918Maltby3,977Sunk27 February 1918Machaon6,738Sunk28 February 1918Savoyarde30Sunk4 March 1918Clan Macpherson4,779Sunk8 March 1918Ayr3,050Sunk1 May 1918Matiana5,313Sunk13 August 1918La Chaussade4,494Sunk23 August 1918Australian Transport4,784Sunk25 August 1918Willingtonia3,228Sunk22 January 1919Torpilleur 325100Sunk
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